Thy estimation shall be of the male from twenty years old even unto sixty years old, even thy estimation shall be fifty shekels of silver, after the shekel of the sanctuary. And if it be a female, then thy estimation shall be thirty shekels. And if it be from five years old even unto twenty years old, then thy estimation shall be of the male twenty shekels, and for the female ten shekels. And if it be from a month old even unto five years old, then thy estimation shall be of the male five shekels of silver, and for the female thy estimation shall be three shekels of silver. And if it be from sixty years old and above; if it be a male, then thy estimation shall be fifteen shekels, and for the female ten shekels.Leviticus 27:3-7

Every thing that openeth the matrix in all flesh, which they bring unto the LORD, whether it be of men or beasts, shall be thine: nevertheless the firstborn of man shalt thou surely redeem, and the firstling of unclean beasts shalt thou redeem. And those that are to be redeemed from a month old shalt thou redeem, according to thine estimation, for the money of five shekels, after the shekel of the sanctuary, which is twenty gerahs. Numbers 18:15-16

The value of five shekels for humans above six months old seems to agree with the value given in Leviticus 27. But the other age/gender details are missing in Numbers 18. It's also not clear whether the five shekel value refers to firstborn humans and animals, or to humans only.

Determine the value of consecrated animals according to the following rules.

These rules are a bit complicated, so I'll just let God explain the details to you.

And if it be a beast, whereof men bring an offering unto the LORD, all that any man giveth of such unto the LORD shall be holy. He shall not alter it, nor change it, a good for a bad, or a bad for a good: and if he shall at all change beast for beast, then it and the exchange thereof shall be holy. And if it be any unclean beast, of which they do not offer a sacrifice unto the LORD, then he shall present the beast before the priest: And the priest shall value it, whether it be good or bad: as thou valuest it, who art the priest, so shall it be. But if he will at all redeem it, then he shall add a fifth part thereof unto thy estimation. Leviticus 27:9-13

Only the firstling of the beasts, which should be the LORD's firstling, no man shall sanctify it; whether it be ox, or sheep: it is the LORD's.And if it be of an unclean beast, then he shall redeem it according to thine estimation, and shall add a fifth part of it thereto: or if it be not redeemed, then it shall be sold according to thy estimation. Leviticus 27:26-27

Value consecrated houses according to the following rules.

And when a man shall sanctify his house to be holy unto the LORD, then the priest shall estimate it, whether it be good or bad: as the priest shall estimate it, so shall it stand. And if he that sanctified it will redeem his house, then he shall add the fifth part of the money of thy estimation unto it, and it shall be his. Leviticus 27:14-15

Value consecrated fields according to the following rules.

A homer of barley is worth 50 shekels of silver to God, and 20 gerah's is equal to a shekel. (That's good to know.)

And if a man shall sanctify unto the LORD some part of a field of his possession, then thy estimation shall be according to the seed thereof: an homer of barley seed shall be valued at fifty shekels of silver. If he sanctify his field from the year of jubile, according to thy estimation it shall stand. But if he sanctify his field after the jubile, then the priest shall reckon unto him the money according to the years that remain, even unto the year of the jubile, and it shall be abated from thy estimation. And if he that sanctified the field will in any wise redeem it, then he shall add the fifth part of the money of thy estimation unto it, and it shall be assured to him. And if he will not redeem the field, or if he have sold the field to another man, it shall not be redeemed any more. But the field, when it goeth out in the jubile, shall be holy unto the LORD, as a field devoted; the possession thereof shall be the priest's. And if a man sanctify unto the LORD a field which he hath bought, which is not of the fields of his possession; hen the priest shall reckon unto him the worth of thy estimation, even unto the year of the jubile: and he shall give thine estimation in that day, as a holy thing unto the LORD. In the year of the jubile the field shall return unto him of whom it was bought, even to him to whom the possession of the land did belong. And all thy estimations shall be according to the shekel of the sanctuary: twenty gerahs shall be the shekel. Leviticus 27:16-25

Whatever is dedicated to God, human or animal, must be killed.

Notwithstanding no devoted thing, that a man shall devote unto the LORD of all that he hath, both of man and beast, and of the field of his possession, shall be sold or redeemed: every devoted thing is most holy unto the LORD. None devoted, which shall be devoted of men, shall be redeemed; but shall surely be put to death. Leviticus 27:28-29

Give God 10% of everything you have. You can buy your 10% back by paying 20%.

And all the tithe of the land, whether of the seed of the land, or of the fruit of the tree, is the LORD's: it is holy unto the LORD. And if a man will at all redeem ought of his tithes, he shall add thereto the fifth part thereof. And if a man will at all redeem ought of his tithes, he shall add thereto the fifth part thereof. And concerning the tithe of the herd, or of the flock, even of whatsoever passeth under the rod, the tenth shall be holy unto the LORD. He shall not search whether it be good or bad, neither shall he change it: and if he change it at all, then both it and the change thereof shall be holy; it shall not be redeemed. Leviticus 27:30-33

Thou shalt truly tithe all the increase of thy seed, that the field bringeth forth year by year. And thou shalt eat before the Lord thy God, in the place which he shall choose to place his name there, the tithe of thy corn, of thy wine, and of thine oil, and the firstlings of thy herds and of thy flocks; that thou mayest learn to fear the Lord thy God always.
And if the way be too long for thee, so that thou art not able to carry it; or if the place be too far from thee, which the Lord thy God shall choose to set his name there, when the Lord thy God hath blessed thee:
Then shalt thou turn it into money, and bind up the money in thine hand, and shalt go unto the place which the Lord thy God shall choose:
And thou shalt bestow that money for whatsoever thy soul lusteth after, for oxen, or for sheep, or for wine, or for strong drink, or for whatsoever thy soul desireth: and thou shalt eat there before the Lord thy God, and thou shalt rejoice, thou, and thine household,
And the Levite that is within thy gates; thou shalt not forsake him; for he hath no part nor inheritance with thee.
At the end of three years thou shalt bring forth all the tithe of thine increase the same year, and shalt lay it up within thy gates:
And the Levite, (because he hath no part nor inheritance with thee,) and the stranger, and the fatherless, and the widow, which are within thy gates, shall come, and shall eat and be satisfied; that the Lord thy God may bless thee in all the work of thine hand which thou doest. Deuteronomy 14:22-29